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CaHeK987 [17]
3 years ago
7

Quarks are thought to be the basic components of___________.

Biology
1 answer:
attashe74 [19]3 years ago
7 0
Hadrons: 

Protons and neutrons
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Choose the term that correctly describes the relationship between these two sugar molecules
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Answer;

-Structural isomers.

Explanation;

-Isomers are molecules that have the same molecular formula, but have a different arrangement of the atoms in space.

-Structural Isomers are molecules which have the same molecular formula but have different connectivities. That is; the molecules have the same molecular formula, but their atoms have different arrangements or bonds.

-For example, butane and isobutane are structural isomers, also called chain isomers. In chain isomers, the carbon atoms are connected in different orders. Isobutane and butane have a molecular formula of C4H10.

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When a vegetable is placed in very salty water, the vegetable becomes soft and collapses. why does this happen?
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The answer is B, because salt water has lots salt, and little water. The cells lose their water content and fill up with salt, causing ti to collapse.

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Exploring new sources of coal depositsAnswer:

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The fight or flight response of the nervous system is promoted by the _______ nervous system:
erastova [34]

Answer:

Sympathetic Nervous System

Explanation:

The main function of the sympathetic nervous system is to stimulate the fight or flight response.

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Drag each label to the correct location on the diagram.
algol13

Diagram found elsewhere attached

Answer:

Clockwise from bottom

3. formation of mRNA in the nucleus

6. secretion of hormone  by tissue

4. initiation of DNA  replication because  of a signal given  by the hormone

2. synthesis of protein  molecule by mRNA  and tRNA

1. secretion of protein  by the cell

5. binding of the  hormone molecule  with its receptor  of the cell

Explanation:

The tissue in the top left releases a hormone. For example, a steroid hormone such as estrogen, which can impact gene expression at the level of transcription. This hormone then travels to a different cell to carry out its function. The hormone is able to enter the cell and binds receptors which recognise it. In this case, these receptors are present in the nuclear envelope. When the hormone has bound the receptor, it initiates a signalling cascade that the cell responds to.

In this case, the effect of the signal from the hormone is to initiate DNA replication. This is a common effect of hormones such as growth factors that signal the cells to proliferate.

The initiation of the signalling can  also affect how genes are expressed. In this case, an mRNA is produced in the nucleus, which is created as a result of transcription. This mRNA molecule then moves to the cytoplasm, where it becomes translated into a polypeptide sequence at a ribosome, with the help from transfer RNAs (tRNAs).

This polypeptide forms a mature protein by progressive folding and potential modifications, and is released by the cell to perform its functions.

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3 years ago
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